truffle-config.js

const gas = 6.5 * 1e6
const gasPrice = 2000000000 // 2 gwei


/*===========================
 * Config for deployment
 *===========================
 */

const HDWalletProvider = require('truffle-hdwallet-provider');

const infuraKey = process.env.INFURA_KEY;
const mnemonic = process.env.MNEMONIC;
console.log(mnemonic)

module.exports = {
  networks: {
    development: {
      host: 'localhost',
      port: 8545,
      network_id: '*',
      websockets: true
    },
    coverage: {
      host: 'localhost',
      port: 8555,
      network_id: '*',
      gas: 0xfffffffffff,
      gasPrice: 0x01,
      websockets: true
    },
    rinkebyIPC: {
      host: 'localhost',
      port: 8545,
      network_id: 4,
      timeoutBlocks: 200,
      gas: gas,
      gasPrice: gasPrice,
      skipDryRun: true
    },
    rinkeby: {
      provider: () => new HDWalletProvider(mnemonic, `https://rinkeby.infura.io/v3/${infuraKey}`, 0, 10), //Added 4th param sets number of accounts to generate
      network_id: 4,       // Rinkeby's id
      gas: 5500000,        // Ropsten has a lower block limit than mainnet
      confirmations: 2,    // # of confs to wait between deployments. (default: 0)
      timeoutBlocks: 200,  // # of blocks before a deployment times out  (minimum/default: 50)
      skipDryRun: true     // Skip dry run before migrations? (default: false for public nets )
    },
    mainIPC: {
      host: 'localhost',
      port: 8545,
      network_id: 1,
      timeoutBlocks: 200,
      gas: gas,
      gasPrice: gasPrice,
      skipDryRun: true
    }
  },
  compilers: {
    solc: {
      version: './node_modules/solc',
      settings: {
        optimizer: {
          enabled: true,
          runs: 200
        }
      }
    }
  }
}